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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: 23:16 136 G6AVK de EB3FRN-1 Op32 Deep Search 725 mi -40 dB |
| From: | DK7FC <[email protected]> |
| Date: | Tue, 19 May 2015 14:50:53 +0200 |
| In-reply-to: | <579355A36AEE9D4FA555C45D556003AB1B10678B@servigilant.vigilant.local> |
| References: | <579355A36AEE9D4FA555C45D556003AB1B10678B@servigilant.vigilant.local> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
| User-agent: | Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 |
Hi Luis, Am 19.05.2015 12:46, schrieb VIGILANT Luis Fernández: ...so maybe it is worth to try a 10m vertical on your high rise building? :-)[...] It is amazing to check how just a little of vertical antenna height increase can boost the Tx signal ! :-) For low distances it will work as expected, i.e. about 120/30 = 4 => 6 dB 'better' but for DX you will need a stable path! This will work on VLF but not on LF and not at all on MF. This is why WSPR-15 is used on LF but not on MF. For MF, something arround QRSS-10 is the slowest useful mode i think, at least for DX. See https://dl.dropboxusercontent.com/u/19882028/MF/DK7FC_QRSS-10_476_KHz_12-28-2012.jpg to get an impression how blurry a QRSS-10 MF signal becomes in some 1000 km distance.The question is .... What should be expected from a Op2H with Dynamic Search ?? 73, Stefan |
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